Take the decimal, and determine how many places are after the decimal point. For example, .2 would have one decimal place. You will have one 0 for every decimal place. Put a 1 in front of the zeros. Now, take the number in the decimal, and put it over the 1 and 0’s to have your fraction. For example, .2 has one decimal place, so you would do 2/10, simplified to 1/5.